1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
|
/*
* This file is part of the Advance project.
*
* Copyright (C) 2004, 2005 Andrea Mazzoleni
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef __DISK_H
#define __DISK_H
/**
* Sector size in bytes.
*/
#define SECTOR_SIZE 512
struct disk_geometry {
unsigned sectors; /**< Track size in number of sector. Max is 63. */
unsigned heads; /**< Cylinder size in number of tracks. Max is 256. */
unsigned cylinders; /**< Number of cylinder. Max is 1024. */
unsigned size; /**< Total size in number of sectors. With the limits 63/256/1024 the max size approx. 8 GBytes. */
unsigned start; /**< Number of sectors before the accessible space. */
unsigned char drive; /**< BIOS drive number. 0x0 for first floppy, 0x80 for first harddisk. */
};
struct disk_cache {
unsigned char* data; /**< Data to write. */
unsigned pos; /**< Position of the data in sectors. */
unsigned size; /**< Size of the data in sectors. */
struct disk_cache* next; /**< Next concatenated write. */
};
struct disk_handle {
#ifdef __WIN32__
void* handle; /**< Handle. */
#else
int handle; /**< Handle. */
#endif
struct disk_geometry geometry; /**< Device geometry. */
char device[512]; /**< Device name. */
void* ope_context; /**< Context of the read/write operations callback. */
void (*ope_callback)(void* context, int operation, unsigned pos, unsigned size); /**< Callback for the read/write operations. */
struct disk_cache* cache_list; /**< Delayed write. */
unsigned cache_begin; /**< Start of the delayed write in sectors. */
unsigned cache_end; /**< End of the delayed write in sectors. */
};
unsigned le_uint16_read(const void* ptr);
unsigned le_uint32_read(const void* ptr);
void le_uint16_write(void* ptr, unsigned v);
void le_uint32_write(void* ptr, unsigned v);
struct disk_handle* disk_open(const char* dev);
int disk_close(struct disk_handle* h);
struct disk_handle* disk_find(void);
int disk_read(struct disk_handle* h, unsigned pos, void* data, unsigned size);
int disk_write(struct disk_handle* h, unsigned pos, const void* data, unsigned size);
#endif
|
